Most of the training aids act only on the forehand and take an important part of the horse impulse. This can be compensated by the rider legs while riding, but this becomes a lot more difficult when the horse is not ride. You risk obtaining an artificial position of your horse, without engaging the back legs which has no interest at all. In fact, the final interest of a training aid is to help your horse to engage his back legs and to provoke a back work which allows afterwards to obtain a horse position, in balanced and which surrenders in his nape. This is an important part of the training and of the musculation of your horse. Thanks to his conception with a part on the top of the back legs, the training aid favours the engaging of the back-hand and avoids efficiently that your horse becomes flat and makes him on his bit by a soft and precise way. Ideal for lunging work, for walker, harnessed or even while riding.